libmystdio.a:my_stdio.o my_string.o
	ar -rc $@ $^
	echo "build $^ to $@ ... done"

%.o:%.c
	gcc -c $<
	echo "compling $< to $@ ... done"

.PHONY:clean
clean:
	rm -rf *.a *.o stdc*


.PHONY:output
output:
	mkdir -p stdc/include
	mkdir -p stdc/lib 
	cp -f *.h stdc/include
	cp -f *.a stdc/lib 
	tar -czf stdc.tgz stdc 

